Question

Efectuează. Vă rog mult​dau 100 de puncte

Answer 1

Răspuns:

$\\ 1 - \frac{1}{2} \div (1 - \frac{1}{2} ) \div [ - \frac{1}{5} + ( - 4) \times ( \frac{1}{3} + \frac{1}{3} \div ( - 2)] + \frac{1}{13} = \\ 1 - \frac{1}{2} \div ( \frac{2 - 1}{2} ) \div [- \frac{1}{5} + ( \frac{1}{3} + \frac{1}{3} \times ( - \frac{1}{2} )] + \frac{1}{13} = \\ 1 - \frac{1}{2} \div \frac{1}{2} \div [ - \frac{1}{5} + ( \frac{1}{3} + ( - \frac{1}{6} )] + \frac{1}{13} = \\ 1 - \frac{1}{2} \div \frac{1}{2} \div [ - \frac{1}{5} + ( \frac{1}{3} - \frac{1}{6} )] + \frac{1}{13} = \\ 1 - \frac{1}{2} \div \frac{1}{2} \div [ - \frac{1}{5} + ( \frac{2 - 1}{6} )] + \frac{1}{13} = \\ 1 - \frac{1}{2} \div \frac{1}{2} \div ( - \frac{1}{5} + \frac{1}{6} ) + \frac{1}{13} = \\ 1 - \frac{1}{2} \times 2 \div ( \frac{- 6 + 5}{30} ) + \frac{1}{13} = \\ 1 - \frac{1}{2} \times 2 \div ( - \frac {1}{30} ) + \frac{1}{13} = \\ 1 - \frac{2}{2} \times (-30) + \frac{1}{13} = \\ 1 - 2 \times (-15) + \frac{1}{13} = \\ 1 + 30 + \frac{1}{13} = \frac{13 +390 + 1 }{13} = \frac{404}{13}$

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